Method of covering pipes.



E. A. KELLAM.

METHOD 0F COVBRING PIPES.

APPLIOATION FILED MAY 19, 1909.

Patented Sept 13,1910.

WITNESSES am A. mmm, or NEW Yoan, N. Y.

METHOD 0F COVERING PIPES.

speciamion of Letters Patent.

Patented Sept. 13, 1910.

' Application led Bay 19, 1909. Serial No. 496,873.

To all wwm it my cmwem:

Be it known that I, ELI A. KELLAM, a. citizen of the United States, and a resident of the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Method of Covering Pipes, of'which the following is a full, clear, and exact description.

This invention relates toa pipecovering to be used to prevent an interchange of heat between the surroundin medium and the contents of the pipe; an also relates to the method of applying the covering to the pipe.

The object of the invention is to produce a new `and improved article by a newcf nd limproved method, which will be simpl in construction, elicient and durable.

The invention consists broadly of a plurality of non-conducting layers superposed one on the other in a successive manner around a pipe and in sucha way as to form an eilicient heat-insulating cover.

The invention further consists in "the construction and combination of parts, to be more fully described hereinafter and particularly set forth in the claims.

Reference is to be had to the accompanying drawings forming a part of this specication, in which similar characters of ref- 4 erence indicate corresponding parts in both -ducting pi e,l which ma views, and iniwhich- Figure 1 is a longitudinal view with the successive layers broken away, showing the underlying layers; and Fig. 2 is a transverse section through the pipe and covering, the

- v parts being spaced to distinguish between the relative layers.

Referring more particularly to the parts of the invention, 1 indicates a suitable con be used to carry any suitab e iuid having a temperature greater or less than the surrounding medium. Directly on the pipe, there is applied a coatin of a suitable varnish, which is indicate at 2, and which is preferably Japan varnish, an number of layers of which may be applied to the pipe. Su erosed on the coating of Japan varnish,t ere 1s placed one or more layers 'of tar paper 3 andA. Before applying these layers of tar paper, thesurfaces thereof are coated with a suitable hot adhesive material, such as hot pitch. Surrounding the layers of tar paper, there are applied alternate layers of felt and tar paper coated with hot pitch, the felt being indicated by the numerals 5 and 7, and the tar paper by the numerals 6 and 8.

The number of alternate layers of felt and tar paper may be varied, but are preferably two in number.

Superposed on the last layer of tar paper, a smooth covering of rosin paper 9 is applied. Both the longitudinal and transverse joints of each successive layer are staggered relative to the joints on the; adjacent la er or layers. The covering so far forme is inclosed in a suitable canvas covering 10, of any preferred weight, which may be either sewed on or pasted on, and which is, lfinally, coated with a plurality of applications of lead and oil, indicated by the numerals 11 and 12.

The method of ap lying the successive layers consists in irstc eaning the outer surface of the pipe, then applying a coating of Japan varnish, on whic are applied in successive layers a plurality of strips of tar paper which have been coated with a layer of hot pitch. Upon these strips of tar pa er,

'there are superposed, first, a layer of elt,

and then a layer of tar paper, which has also been coated with hot pitch; next, there is applied another layer of felt and a succlosed in a layer of smooth rosin paper, on

top of which is applied a covering of clanvas, the edges of which may be either sewed or pasted together. The completed pipe covering is then given a coating of suitable paint, such as white-lead and oil.

The method of applying the tar paper to the pipe by coating it with hot pitch, not only forms a strong adhesive, but also serves to form dead or vacuum spaces between the successive layers, by reason of the fact that after the coverin has been completed and the material coos down, the gases which have accumulated between the layers also cool down and form a series of partial vacuums between the successive layers, thereby deadening the circulation. I may also wrap one or more or all of the successive layers to the material beneath by 'a suitable binder, such as cord, jute or the like.

There is thus formed a complete heatinsulating pipe covering, which is especially adapted to be used in connection with brine vention of the formation of a frost on the pipes Willbe accomplished.

Having thus described my Iinvention, I claim as new and desire to secure by Letters Patent z- 1. Themethod of covering a pipe, which consists' in cleaning the pipe, applying a coating of varnish, coating tar paper with hot pitch, and applying the tar paper to the pipe while the pitch is still hot, next applylng successive alternate layers of felt and tar paper coated with hot pitch, then inclosing the su erposcd la ers in rosin paper, next inclosing the built-up covering in a canvas jacket, and nally a plying one or more coats of white lead an oil.

2. The method of covering a ipe, which consists in applying a coating ovarnish to the pipe, coating tar paper with hot pitch and applying the tar paper to the pipe while 4the pltch is still hot, then applying successive alternate layers of felt and tar paper.

3. The method of covering api e, which varnish consists in applying a coating o to the pipe, ycoating tar paper with hot pitch and applying the tar paper to the pipe while the pitch is still hot, then applying successive alternate layers of felt and tar paper, said alternate layers 'of tar paper being 30 coated with hot pitch before applying, and being applied while the pitch is still hot, so as to form dead or vacuum spaces between the layers, on cooling.

4. The method of covering a pi e, which consists in applying a coatlng o varnish to the pipe, coating tar paper with hot pitch and applying the tarfpaper to the pipe while the lpltch is still hot, then applying successive alternatey layers of felt and tar paper, 40 said alternate layers of tar paper being coated with hot pitch before applying, and

being applied while the pitch is still hot, sfr

as to form dead or vacuum spaces between the layers, on cooling, and finally inclosing the built-up layers in a protecting covering.-

In testimony whereof-I have signed my name to this specication in the presence of two subscribing witnesses.

l ELI A. KELLAM.

Witnesses:

HoRATro WrurINe, GRIsELL B. HENRY. 

